package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.reactive.TransactionalOperator;

import java.util.List;

/*
套餐业务实现
* */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     * @param setmealDTO
     */
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
//        向套餐表插入数据
        setmealMapper.insert(setmeal);
//        获取生成的套餐id
        final Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        for(SetmealDish setmealDish:setmealDishes){
            setmealDish.setSetmealId(setmealId);
        }
//        保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        int page=setmealPageQueryDTO.getPage();
        int pagesize=setmealPageQueryDTO.getPageSize();
        PageHelper.startPage(page,pagesize);
        Page<SetmealVO> pagea=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(pagea.getTotal(),pagea.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id->{
            Setmeal setmeal=setmealMapper.getBy(id);
            if(StatusConstant.ENABLE==setmeal.getStatus()){
//                起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        ids.forEach(setmealId->{
//            删除套餐中的数据
            setmealMapper.deleteById(setmealId);
//            删除套餐关系表中的数据
            setmealDishMapper.deleteById(setmealId);
        });
    }
    /**
     * 根据id查询套餐和套餐菜品关系
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal=setmealMapper.getBy(id);
        List<SetmealDish> setmealDishes=setmealDishMapper.getBySetmealId(id);
        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }
    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
//        1.修改套餐表，执行update
        setmealMapper.update(setmeal);
//        套餐id
        final Long setmealId = setmealDTO.getId();
//        2.删除套餐和菜品的关联表，操作setmeal——dish表，执行delete
        setmealDishMapper.deleteById(setmealId);
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish->{
            setmealDish.setSetmealId(setmealId);
        });
//        重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐起售停售
     * @param status
     * @param id
     */
    @Override
    public void startOrstop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status==StatusConstant.ENABLE){
            List<Dish> dishList=dishMapper.getBySetMealId(id);
            if(dishList!=null&&dishList.size()>0){
                dishList.forEach(dish->{
                    if(dish.getStatus()==StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal=Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

}
